Improvement in steam-engine puppet-valves



v v Emea ,sulla GEORGE E. MORSE, OE POETLANo-MAINE.

Letters Patent .N 96,463, dated November 2, 1869.

IMPROVEMENT IN' STEAM-ENGINE :BUFFET-VALVES.

The Schedule referred to in there Letters Patent and making prr of tho annie.

To all 'whom it may concern:

Be it known that I, GEORGE F. MORSE, of Iortland, in the county ot' Cumberland, and StateA ot' Maine, have invented anew and useful Double-Puppet Throttle-Valve; and I hereby declare the t'ullewing to be att'ull, clear, and exact description there- Ot', which will enable others tO make and use my invention, reference being had to the accompanying drawings, forming part et' this specification, in wh'reh- Figure l is a. side sectional elevation, the valve be' ing close.

Figure 2 is the same, the .valve beingopened. Figure 3 is a top plan of the valve-opening. .Figure 4 is a side elevation of the smaller or interior valve.

Figure 5 is a top view Ot' the same. Figure 6 is a side elevation of the greater valve. Figure 'l' is a top view of the. saine. lll y invention relates to a throttle-valve, so eenstruc-tedv that; it may be opened with greater ease and more gradually than the ordinary form of valves, as at present Iliade.

My invention consists in making the alve of two parts, one smaller than the other, the said smaller one being within -or near by the larger, with attachments for opening, so arranged that the smaller is first' opened, and after: it has attained its full opening, the. larger one is then Subsequently opened also, the opening ot' the smaller facilitating the opening ot' thel larger, 'and the'sueeessive action et' the two rendering' the Opening more gradual.

ln lthe ordinary slide throttle-valve the pressure on the valve renders the opening more or less diteult, although ip this valve the opening is gra-dual;

In the Ordinary puppet throttle-valve the pressure against Openin.r is considerable, and inasmuch as thatpressure is instantly relieved when the valve is opened, the tendency is to Open the valve wide and suddenly.

This gives the engine too much steam, and causes jerking;` of the train of ears; or* slipping of the driving-wheels, when the valve is used on a locomotiveengine. Moreover, considerable force is necessary to open the valve.' n t l W'ith my improved doublepnppet throttle-valve these inconveniences do not occur, because the smaller valve is lnadevso small .that the pressure of .steam against its opening is easily overcome, and the area of its opening is so small, there is no danger ot' jerking the train or slipping the driving-wln'els ofthe engine.

When the smaller alve is fully open, the larger immediately connnenee's to open, and the pressure hpon it has been partially relieved by the escape 'of the steam through the smaller aperture.

Thus the larger valve opens to its l'ull extent, being aided by the opening of the snmllel"val\'e, and the full area ot' opening required by the engine is obtained withontditlienlty.

In the aemlmpanring drawingsa is the larger valve, and its t\ v.l parts-b e, tu lit the seats ll e. j

f shows the smaller valve. with its two parts g h,

to lit the seats ij within the larger valve a. A

'lhe operatipn is clearly indicated in figs. l and 2, and the opening: ol' the smaller valve, to aid in and render more' gradual the openinz,r et' the larger, is more particularly'shown in lig. .l.l

In the accompanying drawing, the smaller valve .is

`vindicated as within the larger one.

What 1 claim as my invention, and desire to secure by Lett-ers Patent, is-

' 'llie double-puppet throttle-valve, as described,

having the valve of smaller area. to operate h'rst, and the valve Oflarger avea to Operate subsequently, snbstantially in the manner described.

GEO. 'Fe MORSE. lVitnesse-s:

WM. H. CLIEFonDy ,Hexer G. HOUSTON. 

